RFR: 4512626: Non-editable JTextArea provides no visual indication of keyboard focus [v2]

[Alexander Zuev]

> Set the text caret to be visible but not blinking on the non-editable text area.

Alexander Zuev has updated the pull request incrementally with one additional commit since the last revision:

  Handling the case when blink rate is set while component is unedited
  Test HidingSelectionTest.java is rewritten and corrected.

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Changes:
  - all: https://git.openjdk.org/jdk/pull/11408/files
  - new: https://git.openjdk.org/jdk/pull/11408/files/2f286343..97bf7c55

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=11408&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=11408&range=00-01

  Stats: 55 lines in 2 files changed: 13 ins; 34 del; 8 mod
  Patch: https://git.openjdk.org/jdk/pull/11408.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/11408/head:pull/11408

PR: https://git.openjdk.org/jdk/pull/11408